cc: Adding support for RGBA_4444 tile textures

cc/resources/pixel_buffer_raster_worker_pool.h

Index: cc/resources/pixel_buffer_raster_worker_pool.h
diff --git a/cc/resources/pixel_buffer_raster_worker_pool.h b/cc/resources/pixel_buffer_raster_worker_pool.h
index b5d1f78c3109f5c1fdeabd089ecbf401bff12948..047f9431caab84f5c28c5c51c8a96ee3a746215b 100644
--- a/cc/resources/pixel_buffer_raster_worker_pool.h
+++ b/cc/resources/pixel_buffer_raster_worker_pool.h
@@ -20,11 +20,13 @@ class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool {
   static scoped_ptr<RasterWorkerPool> Create(
       ResourceProvider* resource_provider,
       size_t num_threads,
-      size_t max_transfer_buffer_usage_bytes) {
+      size_t max_transfer_buffer_usage_bytes,
+      ResourceProvider::TextureFormat format) {
     return make_scoped_ptr<RasterWorkerPool>(
         new PixelBufferRasterWorkerPool(resource_provider,
                                         num_threads,
-                                        max_transfer_buffer_usage_bytes));
+                                        max_transfer_buffer_usage_bytes,
+                                        format));
   }
 
   // Overridden from WorkerPool:
@@ -33,14 +35,15 @@ class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool {
 
   // Overridden from RasterWorkerPool:
   virtual void ScheduleTasks(RasterTask::Queue* queue) OVERRIDE;
-  virtual GLenum GetResourceFormat() const OVERRIDE;
+  virtual ResourceProvider::TextureFormat GetResourceFormat() const OVERRIDE;
   virtual void OnRasterTasksFinished() OVERRIDE;
   virtual void OnRasterTasksRequiredForActivationFinished() OVERRIDE;
 
  private:
   PixelBufferRasterWorkerPool(ResourceProvider* resource_provider,
                               size_t num_threads,
-                              size_t max_transfer_buffer_usage_bytes);
+                              size_t max_transfer_buffer_usage_bytes,
+                              ResourceProvider::TextureFormat format);
 
   void FlushUploads();
   void CheckForCompletedUploads();
@@ -80,6 +83,7 @@ class CC_EXPORT PixelBufferRasterWorkerPool : public RasterWorkerPool {
 
   bool should_notify_client_if_no_tasks_are_pending_;
   bool should_notify_client_if_no_tasks_required_for_activation_are_pending_;
+  ResourceProvider::TextureFormat format_;
 
   DISALLOW_COPY_AND_ASSIGN(PixelBufferRasterWorkerPool);
 };